FISHERY BULLETIN: VOL. 83, NO. 1 



cal rostral teeth, differ strikingly in other fea- 

 tures. In S. typica the sculpture of the abdomen is 

 stronger than that in the eastern Pacific shrimp, 

 exhibiting a long and deep posterior pleural sulcus 

 on the first four somites instead of ones that are 

 weak or even obsolete, and the telsonic spines are 

 quite inconspicuous, rather than being well devel- 

 oped as they are in S. penicillata .Also, in S. typica 

 the petasma lacks long slender distal projections 

 as well as accessory flagella, the thelycal plate of 

 sternite XIV is almost flat laterally instead of ele- 

 vated in strong bosses, and the posteromedian 

 emargination of the posterior component of the 

 median plate is quite broad rather than narrow or 

 even reduced to a longitudinal incision as it is in S. 

 penicillata. 



Remarks. — The types of this species were de- 

 stroyed in the San Francisco earthquake and fire 

 of April 1906 as were all of Lockington's types 

 which had been deposited at the California Acad- 

 emy of Sciences (Dunn 1982). The locality of one of 

 the syntypes, the one Lockington described in de- 

 tail, "Bolinas Bay, Lower California," is uncertain. 

 The NIS Gazetteer (Office of Geography, Depart- 

 ment of the Interior, 1956) does not include any 

 place or geographic feature under "Bolinas". On 

 the west coast of Baja California Sur is Bahia de 

 Ballenas or "Ballenas Bay" (NIS Gazetteer, p. 50), 

 at 26°45'N, 113°26'W, and it is quite possible that 

 the name of this locality was misspelled on the 

 label accompanying the sjnitj^e or that Lock- 

 ington misread and transcribed it as "Bolinas 

 Bay". There is a bay by this name at 37°53'36"N, 

 122°39'54"W, in Marin County, California; how- 

 ever, I am inclined to think that Bahia de Ballenas 

 actually is the place where the specimen was ob- 

 tained because it is well within the range of the 

 species, whereas Bolinas Bay is not only outside 

 "Lower California" but also far beyond the known 

 northern limit of this shrimp — southwest of 

 Punta Canoas, Baja California Norte. 



Commercial importance. — There is a fishery for 

 rock shrimp in the northern half of the Gulf of 

 California, and the catches are believed to consist 

 largely of S. penicillata a very abundant species in 

 that area. This fishery in 1979-80 produced 

 1,426,541 kg, but in 1981-82 (data recorded in 

 Guaymas by the Instituto Nacional de Pesca, 

 Mexico), the last year for which landings are 

 available, the production declined sharply to 

 187,786 kg; fishing for rock shrimp is only sea- 

 sonal, from February to June, with maximum 



catches being obtained during March and April 

 (Concepcion Rodriguez de la Cruz see footnote 2). 



Material. — 939 specimens from 56 lots. 



Mexico— Baja California Norte: 29, SIO, SW 

 of Punta Canoas (29°20'N, 115°02'W), 40 m, 6 Sep- 

 tember 1952, K. S. Norris. 16 29, SIO, Bahia 

 Playa Maria, 11 m, 1 April 1952, K. S. Norris. 39 , 

 SIO, Bahia Sebastian Vizcaino, surface, 17 Au- 

 gust 1952, Spencer F. Baird. 16 , YPM, E of Isla 

 Cedros, 1-73 m, Zaca stn 126D-3. 49 , SIO, Bahia 

 Sebastian Vizcaino, 0-2 m, 14 August 1952, K. S. 

 Norris. Baja California Sur: 3d , SIO, Bahia 

 Sebastian Vizcaino, 55 m, 11 August 1952, K.S. 

 Norris. 16 , SIO, E of entrance to Laguna Ojo de 

 Liebre, 2 m, 16 August 1952, K. S. Norris. 76 59, 

 SIO, Bahia Tortolo, 31 March 1962, H. C. Per- 

 kins. Id 29, SIO, E of Punta Asuncion, Bahia 

 Asuncion, 15 m, 24 March 1951, R. Wisner and K. 

 S. Norris. 66 99, SIO, Bahia Asuncion, 40-44 m, 

 17 November 1964, Black Douglas . 136 119 , SIO, 

 Bahia Asuncion, 68-64 m, 17 November 1964, 

 Black Douglas. 116 149, SIO, Laguna San Ig- 

 nacio, 1.5 m, 11/12 February 1950, C. Hubbs. 3d 

 89, SIO, Bahia de Ballenas, 18 m, 14 February 

 1948, Scripps. 43d 509, SIO, SE of Punta Abre- 

 ojos, 55-59 m, 17 November 1964, Black Doug- 

 las. 246 229, SIO, W of Punta Pequeha, 37-40 m, 

 16 November 1964, Black Douglas. 266 219 , SIO, 

 off Punta Pequeiia, 55-51 m, 16 November 1964, 

 Black Douglas. 46 109, SIO, WSW of Punta 

 Pequeha, 68-73 m, 16 November 1964, Black Doug- 

 las. 16 59, SIO, NW of Santo Domingo del 

 Pacifico, 45-40 m, 19 April 1969, D. Dock- 

 ins. 26d 399, SIO, 15 km WSW of Boca de las 

 Animas, 55-57 m, 16 November 1964, Black Doug- 

 las. 26 39, SIO, S of Boca de las Animas, 137 m, 

 29 January 1964, C. Hubbs. 13d 79 , SIO, between 

 Boca de Santo Domingo and Boca de Sole- 

 dad, 12 m, 5 February 1964, A. Stover and B. 

 Zahuranec. 19, USNM, Boca de Soledad, 26 

 April 1964, H. Chapa. 19, SIO, channel N of 

 Bahia Magdalena, 6 m, 30 January 1964, A. Stover 

 and B. Zahuranec. 48d 449, SIO, NW of Isla 

 Santa Magdalena, 73 m, 15 November 1964, Black 

 Douglas. 3d 39, SIO, Bahia Santa Maria, 0-36 

 m, 8 December 1962, H. C. Perkins. Id 19, SIO, 

 Bahia Magdalena, 42-44 m, 29 November 1962, F 

 H. Berry. 19, USNM, Bahia Magdalena, surface, 

 10 July 1953. 14d 99, SIO, Bahia Magdalena, 

 37-40 m, 24 August 1960, F H. Berry 8d 69, 

 YPM, Bahia Magdalena, 0.6-0.9 m, 1936, Zaca 

 [unnumbered stn]. 19, AHF, Bahia Magdalena, 

 between mainland and Punta Redonda, 15 m, 5 



42 



