LAMBRUS  HASSLERI. 15 
laciniated teeth posteriorly ; the largest of these teeth is situate at the lateral 
angle of the carapace. There is one very prominent tooth on the postero- 
lateral margin, together with three or four smaller ones, The edges of the 
segments of the chelipeds are furnished with granulated spines and the ex- 
posed surfaces of all the segments are tuberculate ; on the lower face of the 
propodus the more prominent tubercles are arranged in a longitudinal median 
row. The merus joints of all the ambulatory appendages are spinulose on 
their upper and lower edges, and on the last pair there are also a few 
rudimentary spines or tubercles on the carpus and one near the middle of 
the upper margin of the propodus. Distinct traces of red transverse bands 
are to be seen on the upper surface of the cheliped, two on the merus, one 
on the carpus, one on the propodus, and one on the base of the dactylus. 
Abdomen tuberculous in both sexes, the most prominent tubercles being on 
the middle of each segment from the second to the sixth inclusive. 
Dimensions of a female: length of carapace, 27 mm.; breadth of cara- 
pace, including lateral teeth, 38 mm.; length of merus of cheliped, 30 mm. ; 
length of propodus of cheliped (to base of dactylus), 33 mm. 
Station 3368. 66 fathoms. 1 fem. 
a By, teil) Ge 1 male, 1 fem. 
This species was previously obtained during the voyage of the “ Hassler” 
at Magdalena Bay, Lower California, August 14, 1872. The specimens then 
collected (3 ¢, 1 2°, dry) were apparently picked up dead on the shore. In 
three of these examples the more prominent tubercles on the carapace are 
longer and more spine-like than in those obtained by the “ Albatross.” 
Lambrus hassleri is the Pacific coast representative of L. pourtalesw Stimps. 
of the eastern coast of North America. The two species are very closely 
related, but Z. hass/er? differs from the eastern form in the following par- 
ticulars: the carapace is broader in proportion to its length ; the branchial 
regions are more expanded and inflated, and this inflation extends further in 
toward the cardiac area, so as to involve the oblique row of small tuber- 
cles: that is to say, this row of tubercles, which in L. pourtalesii es low down 
in the fossa which separates the branchial from the cardiac area, is raised up 
in L. hassleri on the swell of the branchial region. The spines on the edges 
of the chelipeds, moreover, are not laciniated to such an extent as they are 
in L. pourtalesii. 
Professor S. I. Smith, misled by imperfections in A. Milne Edwards’s figure 
of L. pourtalesii, has redescribed that species under the name of Lambrus ver- 
