104 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



FABIA LOWKI (Katbbun). 



Plate 24, figs. 2 and 4. 



Fabia subquadrata LOCKINGTON, Proc. California Acad. Sci., vol. 7, 1870 

 (1877), p. 155 [11], (part; specimen from San Diego). HOLMES, 

 Occas. Papers California Acad. Sci., vol. 7, 1900, p. 87 (part; speci- 

 men from San Pedro in Tapes, described). 



Raphonotvs lowei RATHBUN, Arner. Nat., vol. 34, 1900, p. 590 (type-locality, 

 San Pedro Bay, California, in siphon of Pholast pucifica; holotype fe- 

 male, Cat. No. 23437, tJ.S.N.M.) ; Harriman Alaska Expert., vol. 10, 

 1904. p. 186, text-fig. 93. 



Diagnosis. Front smooth and naked, without sulcus. Last seg- 

 ment of maxilliped does not reach end of penult segment. Palm not 

 widening distally. A single row of hair on lower surface of palm. 



Description of female. Carapace a little wider than in sub- 

 quadrata, which it strongly resembles. Front without trace of shal- 

 low, transverse sulcus and without pubescence. Last segment of outer 

 maxilliped does not reach end of penult segment. The palm does not 



widen distally, its margins 

 being subparallel or a little 

 convex; only one line of 

 hair on lower surface, which 

 fr is continued to end of finger. 



FIG. 55. FABIA LOWBI, FEMALE (23437). a, EN- Fingers less arched and less 



DOGNATH OF orTEB MAxu.LipEo, x 10 ; 6, LEFT gaping than in subquadmta. 



CHELA, X 4, .-.. j 



Posterior margin of pro- 

 podus of first leg convex, of last leg slightly concave. 



Color. In life, whitish; carapace and abdomen largely covered 

 with orange (Holmes). 



Habitat. Commensal hi bivalve inollusks, namely, Pholas, Pachy- 

 desma, Modiola, and Tapes=Paphia. 



Measurements. Female (23437) length of carapace 10. width of 

 same 12.5 mm. 



Range. California, from San Pedro to San Diego. 



Material examined. 



San Pedro Bay; hi siphon of Pholas pacifica; H. N. Lowe; 2 

 females ovig. (1 holotype) (23437). 



San Pedro ; in siphons of mussel, Modiola modiolus; H. N. Lowe ; 

 29 females (14 ovig.) (29945). 



San Pedro; H. N. Lowe; 1 female ovig. (32978). 



Long Beach, California; H. N. Lowe; 15 females (13 ovig.) 

 (49221). 



Alamitos Bay; in mantle cavity of Pholas calif omica; Venice Mar. 

 Biol. Sta.; 1 female (45583). 



San Clemente Island; H. N. Lowe; 1 female (29944). 



