1921 J Schmitt: The Marine Decapod Crustacea of California 159 

 Paralomis multispina (Benedict) 



Plate 23 ; plate 30, figures 7 and 8 



Leptolitlwdes multispinus Benedict, Proc. U. S. Nat. Mus., 17, 484, 1894. 

 Paralomis multispina Bouvier, Ann. Sci. Nat. (8), 1, 25, 1896. 

 Leptolitlwdes multispina Rathbun, H. A. E., 10, 165, 1904. 



Original Description. — The carapace is about as broad as long; the areolations 

 are well defined. On the median line at the summit of the gastric region there is 

 a sharp spine about 4 mm. in length. The lateral margins are armed with from 

 twelve to sixteen spines about 3 mm. in length. In the young and in some of the 

 adults there are small spines on the branchial region. A semicircular line of six 

 or seven spines marks the limits of the branchial and intestinal regions. The 

 carapace is thickly studded with blunt spines, each terminating in a flattened face 

 or surface cut obliquely to the surface of the carapace; this face is encircled by a 

 fringe of short, stiff bristles. The rostrum consists of a simple median spine with 

 two basal spines. Under the rostrum proper there is a very short, conical spine 

 homologous with the subrostral spine of Lithodes; behind the spine are one or 

 more spinules. The abdomen in the male is composed, after the second segment, 

 of several rows of leathery plates ; the second segment is better calcified and 

 harder. The abdomen of the female is twisted to the right as in Lithodes. 



The chelipeds arc moderately slender and extend almost to the. distal end of 

 the carpal joints. The spines on the inner margin of the carpal segments are the 

 most prominent. The ambulatory legs are long and slender and thickly set with 

 spines. The spines of the merus are not so distinctly arranged in rows as on the 

 carpal and propodal segments ; there is, however, a distinct row on the upper 

 margin. The spines of the carpus are arranged in eight more or less distinct 

 rows; on the propodal segment the spines are arranged in six full rows and two 

 half rows. There are four short rows of spines on the proximal end of the 

 dactylus. The dactyli are compressed, slightly bent, and a little twisted (Bene- 

 dict). 



Dimensions. — Specimen of average size: length 80 mm., width 78 mm., distance 

 from tip to tip of ambulatory legs 360 mm. (Benedict). 



Type Locality. — Off Queen Charlotte Islands, British Columbia, 876 fathoms 

 ("Albatross" station 2860). 



Distribution. — From off Shumagin Bank, Alaska, to off San Diego, California, 

 625 to 876 fathoms (Bathbun). 



Paralomis verrilli (Benedict) 



Plate 24; plate 30, figures 5 and 6 



Pristopus verrilli Benedict, Proc. U. S. Nat. Mus., 17, 486, 1894. 

 Paralomis verrilli Bouvier, Ann. Sci. Nat. (8), 1, 25, 1896. 

 Pristopus verrilli Bathbun, H. A. E., 10, 165, 1904. 



Original Description. — The carapace is verrucose, the areolations prominent. 

 The gastric region is much elevated and is surmounted by a small spine. On each 

 side, on the border of the branchial region, there is a deep pit. A groove runs 

 from the pits to the depression between the gastric and cardiac regions. There 

 are about twelve spines, two to three mm. in length on the lateral border of the 

 carapace. The posterior boundary of the intestinal region is marked by a semi- 

 circular row of tubercles. The cardiac region is triangular ; the apex of the 

 triangle cuts well into the intestinal region where the depression that marks it 

 runs into a deep slit or oblong median depression. The frontal margin is broad 

 and straight. The spines of the anterior angles and the orbital spines point 

 forward; the orbital spines are a little the longer. Between the spine on the 

 angle and the orbit there is a row of smaller spines and one or two granules. The 

 trispinose rostrum is composed of a bifurcate rostrum proper and the subrostral 

 spine which extends much beyond the two upper rostral spines. The antennal 



